Lately we've been working with clients who all need more storage in their bathroom. They would like to add more shelving, but we don't want to fill the "small house" up or clutter the walls with another chipboard cabinet. Vintage towel racks of either the hotel or train variety are a nice solution. These ones above are not vintage, but easy to get your hands on.
The Lugarno ($299) and The Culloden Park are two really nice solutions that highlight Restoration Hardware's strength: hardware. While they have at least ten racks of various styles, we like these for their chic, simple lines and their ability to get towels and robes up out of the way.